RE: Discovering AS Path confederation...

["Daniel Golding" <dan () netrail net>]

Chris,

It appears your speaking of a somewhat well known phenomenon -

- Route A is learned via path 1-2-3-4 in a BGP confederation
- The best path is 1-6-4 due to any number of reasons, including metrics and
traffic engineering.
- The 1-6-4 path could be learned from numerous connected sub-AS's, all of
which have a different AS-Path and AS-Set towards 4.